# -*- coding: utf-8 -*-
"""
populate_signoffs command

Pull the latest commit message from SVN for a given package that is
signoff-eligible and does not have an existing comment attached.

Usage: ./manage.py populate_signoffs
"""

from datetime import datetime
import logging
import subprocess
import sys
from xml.etree.ElementTree import XML

from django.conf import settings
from django.contrib.auth.models import User
from django.core.management.base import NoArgsCommand

from ...models import SignoffSpecification
from ...utils import get_signoff_groups
from devel.utils import UserFinder

logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s -> %(levelname)s: %(message)s',
    datefmt='%Y-%m-%d %H:%M:%S',
    stream=sys.stderr)
logger = logging.getLogger()

class Command(NoArgsCommand):
    help = "Pull the latest commit message from SVN for a given package that is signoff-eligible and does not have an existing comment attached"

    def handle_noargs(self, **options):
        v = int(options.get('verbosity', None))
        if v == 0:
            logger.level = logging.ERROR
        elif v == 1:
            logger.level = logging.INFO
        elif v == 2:
            logger.level = logging.DEBUG

        return add_signoff_comments()

def svn_log(pkgbase, repo):
    path = '%s%s/%s/trunk/' % (settings.SVN_BASE_URL, repo.svn_root, pkgbase)
    cmd = ['svn', 'log', '--limit=1', '--xml', path]
    log_data = subprocess.check_output(cmd)
    # the XML format is very very simple, especially with only one revision
    xml = XML(log_data)
    revision = int(xml.find('logentry').get('revision'))
    date = datetime.strptime(xml.findtext('logentry/date'),
            '%Y-%m-%dT%H:%M:%S.%fZ')
    return {
        'revision': revision,
        'date': date,
        'author': xml.findtext('logentry/author'),
        'message': xml.findtext('logentry/msg'),
    }

def create_specification(package, log, finder):
    trimmed_message = log['message'].strip()
    spec = SignoffSpecification(pkgbase=package.pkgbase,
            pkgver=package.pkgver, pkgrel=package.pkgrel,
            epoch=package.epoch, arch=package.arch, repo=package.repo,
            comments=trimmed_message)
    spec.user = finder.find_by_username(log['author'])
    return spec

def add_signoff_comments():
    logger.info("getting all signoff groups")
    groups = get_signoff_groups()
    logger.info("%d signoff groups found", len(groups))

    finder = UserFinder()

    for group in groups:
        if not group.default_spec:
            continue

        logger.debug("getting SVN log for %s (%s)", group.pkgbase, group.repo)
        log = svn_log(group.pkgbase, group.repo)
        logger.info("creating spec with SVN message for %s", group.pkgbase)
        spec = create_specification(group.packages[0], log, finder)
        spec.save()

# vim: set ts=4 sw=4 et: